import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-25))
r=w0.sketch().arc((-17,17),(-48,-9),(-8,-1)).segment((4,-1)).arc((40,-26),(30,17)).segment((30,30)).segment((-17,30)).close().assemble().push([(-29,0)]).circle(1,mode='s').finalize().extrude(50)